主要用来表示人、事物的现在状况和特点；表示经常或习惯性的动作，句子中常有often, always, from time to time 等；
He usually goes to work at 7 o’clock every morning.
She has a brother who lives in New York.
The earth goes around the sun.
Guangzhou is situated in the south of China.
I learned that the earth goes around the sun when I was in primary
时间：when, until, after, before, as soon as, once, the moment/the minute, the
day; 条件：if, unless, provided.
If he accepts the job, he will get more money soon.
考点三：在make sure (certain), see to it, mind, care, matter ＋宾语从句，
So long as he works hard, I don’t mind when he finishes the experiment.
考点四：在the more… the more … (越……越……) 句型中, 若主句是一般将来时, 从句通常用一般现在时。
The harder you study, the better results you will get.
We are having English class.
The house is being built these days.
The little boy is always making trouble.
Look out when you are crossing the street.
Don't wake him up if he is still sleeping at 7 tomorrow morning.
Marry is leaving on Friday.
考点一：for + 时间段；since + 时间点
They have lived in Beijing for five years.
They have lived in Beijing since 1995.
I have learned English for ten years.
考点二：常见的不确定的时间状语：lately; recently, just, already, yet, up to now; till now;
so far, these days,
Has it stopped raining yet ?
考点三：在表示“最近几世纪/ 年/ 月以来……”时间状语中，谓语动词用现在完成时。
in the past few years/months/weeks/days；over the past few years; during the
last three months; for the last few centuries, through centuries; throughout
history 等考点四：表示“第几次做某事，”或在 “It is the best (worst, most interesting ) +名词 ＋that”
This is my first time that I have visited China.
This is the most interesting film I have ever seen.
That is the only book that he has written.
week; in 1945, at that time; once; during the war; before; a few days ago; when,
考点一：used to + do，表示过去经常但现在已不再维持的习惯动作。to为不定式，后接动词原形。
be/become/get used to + doing，表示习惯于
He used to smoke a lot.
He has got used to getting up early.
He promised to buy me a computer if he got a raise
The boy was doing his homework when his father came back from work.
He was taking a walk leisurely by the lake when he heard someone shouted
What were you doing at nine last night?
The radio was being repaired when you called me.
表示过去某个时间之前已经完成的动作，即过去完成时的动作发生在“过去的过去”，句中有明显的参照动作或时间状语，这种时态从来不孤立使用 ( before,
after, by, up till )
There had been 25 parks in our city up till 2000.
By the end of last term we had finished the book.
They finished earlier than we had expected.
考点一：用于hardly/scarcely...when; no sooner ...than 句型中，主句用过去完成时，从句用一般过去时。
I had hardly finished my work when he came to see me.
I had no sooner got into the room than it began to snow.
No sooner had I arrived home than the telephone rang. （注意主谓）
That was the second time that she had seen her grandfather.
It was 3 years since we had parted。
考点三：动词hope, expect, think, intend, mean, want, suppose, plan
I had hoped that I could do the job.
I had intended to see you but I was too busy.
表在将来某个时间会发生的动作或情况。常和tomorrow, next year, in 2008等表示将来的时间状语连用，其表现形式多达5种。
Beijing will host the 29th Olympic Games in 2008.
We will begin our class as soon as the teacher comes.
考点二：某些表示短暂性动作的动词如arrive, come, go, leave, start等，用形式表示将来。
I am leaving for Beijing tomorrow.
考点三：“ + and/or + 句子”，这种结构中and后面的句子谓语用一般将来时。
Use your head and you will find a way.
考点四：“am (is, are) going to + 动词原形”，表示打算要做的事或可能要发生的事。
“am (is, are) about to + 动词原形”表示按照预定计划或打算准备着手进行的动作。
“am (is, are) to + 动词原形”表示必须、必然或计划将要做的事。
They are to be married in this May.
I’ll be doing my homework this time tomorrow. 明天这会我正在写作业。
The President will be meeting the foreign delegation at the airport.
考点一：常用的时间状语一般用by+将来的时间。如：by the end of this year, by 8 o’clock this
evening, by March next year以及由by the time…, before或when等引导的副词从句。
By the end of next month, he will have traveled 1000 miles on foot.
By the time you reach the station, the train will have left.
By next Tuesday, I will have got ready for the exams.
The children will do their homework the moment they have arrived back from
come true, consist of, take place, happen, become, rise, occur, belong,
break out, appear, arrive, die, fall, last, exist, fail, succeed
It took place before liberation.
考点二：下列动词的表示被动意义, 而且常与well, quite, easily, badly等副词连用。
lock ( 锁 ) ; wash ( 洗 ); sell ( 卖 ); read ( 读 ); wear ( 穿 ); blame
(责备)；ride (乘坐)； write ( 写 )；
Glass breaks easily. 玻璃容易破碎。
The car rides smoothly. 这车走起来很稳。
The case locks easily. 这箱子很好锁。
The book sells well. 这本书很畅销。
It is said…, It is reported…, It is widely believed…， It is expected…, It
而 “以前人们认为……” 则应该说：It was believed…, It was thought…